Frequencies for first 10,000 rows of dlmp_mm variable in natl2007 dataset :

Last Normal |
   Menses - |
  Month U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        895        8.95        8.95
          2 |        652        6.52       15.47
          3 |        257        2.57       18.04
          4 |        662        6.62       24.66
          5 |        845        8.45       33.11
          6 |        859        8.59       41.70
          7 |        857        8.57       50.27
          8 |        930        9.30       59.57
          9 |        852        8.52       68.09
         10 |        914        9.14       77.23
         11 |        897        8.97       86.20
         12 |        978        9.78       95.98
         99 |        402        4.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015